# Thrasymachus — Dialogues character guide

> Thrasymachus in Dialogues by Plato.

**Role:** supporting

**First appearance:** 0057-book-i

## Snapshot

The blunt Sophist who declares justice is merely the advantage of the stronger, daring Socrates to defend it as anything more.

## Who they are

Thrasymachus bursts into the Republic's conversation like a wild beast, impatient with polite hedging and determined to say what everyone else only whispers. He argues that justice is a convention imposed by the powerful for their own benefit, and that the truly strong man ignores it. His challenge forces Socrates to move beyond definitions and defend justice as a good in itself — the question that drives the entire work.

## In the story

### [Dialogues](https://www.betterreads.dev/discover/dialogues_se/chapters/dialogues)

Argues that justice is the advantage of the stronger.

### [Book I](https://www.betterreads.dev/discover/dialogues_se/chapters/book-i)

Thrasymachus argues forcefully that injustice is more profitable than justice, and that justice is a form of simplicity.

### [Book II](https://www.betterreads.dev/discover/dialogues_se/chapters/book-ii)

Referenced as having previously argued that justice is another's good and the interest of the stronger.

### [Book V](https://www.betterreads.dev/discover/dialogues_se/chapters/book-v)

Supports the demand for Socrates to explain the community of women and children; declares all are agreed on the need for an answer.

### [Book VIII](https://www.betterreads.dev/discover/dialogues_se/chapters/book-viii)

Mentioned as the advocate of injustice whose views are contrasted with the argument for justice.

### [Introduction and Analysis](https://www.betterreads.dev/discover/dialogues_se/chapters/introduction-and-analysis)

Another Sophist mentioned as parting on good terms with Socrates, distinct from Plato's ideal Sophist.

## Links

- HTML: https://www.betterreads.dev/discover/dialogues_se/characters/thrasymachus_republic
- Book: https://www.betterreads.dev/discover/dialogues_se
- All characters: https://www.betterreads.dev/discover/dialogues_se/characters